一、间作套种的地位陕北地形复杂,丘陵沙荒面积大,发展林牧业有着广阔前途。今后应大力调整农业生产结构,逐步由以粮食种植业为主过渡到以林牧业为主的综合发展道路。在调整过程中,退耕还林还牧的前提,必须使粮食总产有所增加,生活上无后顾之忧。粮食问题不解决,发展林牧业就没有稳固的基础。解决粮食问题最根本的办法是改广种薄收为少种高产多收。首先要抓好粮食生产基地建设,大力改善生产条件,提高单位面积产量。陕北耕地类型很多,但种植粮食大部分产量低而不稳,适于建设粮食生产基地的只有川地、坝地、滩地、埝地、水平梯田 First, intercropping status North Shaanxi topography complex, large area of ​​waste sand hills, the development of forestry and animal husbandry has a bright future. In the future, we should make great efforts to readjust the agricultural production structure and gradually shift from a focus on grain cultivation to a comprehensive development path dominated by forestry and animal husbandry. In the process of adjustment, the preconditions for returning farmland to forestry and animal husbandry must increase the total output of grain and provide no worries in life. If the grain issue is not resolved, there will be no solid foundation for the development of forestry and animal husbandry. The most fundamental solution to the grain problem is to change the number of thin-walled varieties for the higher yield. We must first focus on the construction of grain production bases, vigorously improve the production conditions and increase the output per unit area. There are many types of arable land in northern Shaanxi, but most of the grain output is low and unstable. Only the land suitable for building grain production bases is the land of dam, the land of beach,